I've used Omnigraffle for the Mac quite a bit — one of the tricky things for me has been figuring out what information to capture, and how. Stuff like "These things have a hardline connection, this thing is mesh-accessible, that thing has extra security," etc are what I've been pondering. Here's the result for a small session I'm running: Outlined items are distinct network-addressible devices, double-outlines indicate hubs for particular subnets, wifi icons indicate that a device is directly mesh-accessible, and locks indicate the presence of a dedicated security AI actively monitoring a given device's traffic.

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What exactly is an AI Core in EP? I thought stuff like "central computers" or whatever is not a thing in the setting anymore

Although a lot of stuff can exist within the distributed computing resources of a mesh network in EP, I'm still assuming that sufficiently demanding applications require some kind of dedicated computational infrastructure. The Cloud, after all, is just someone else's computers. An AGI with sufficiently self-preservation impulses might have a "public-facing" copy of itself spread over a habitat's mesh network, but it would be foolhardy not to have a secure fallback, some dedicated hardware whose purpose is to preserve a frequently-synced carefully-protected "control copy" of itself. In the mini-campaign that I'm running, the 'AI Core' is just that — dedicated infrastructure the habitat AI reserves for itself, with multiple layers of protective security processes keeping out any unauthorized intruders. It hangs its network "hat" behind the same firewall that protects the habitat's dedicated fusion reactor. In the diagram above, it means that an intruder would have to access the 'Cutter' mesh subnet where critical station infrastructure lives, then penetrate the hardline firewall, before being able to interfere with either the habitat AI's critical processes or the fusion reactor that powers the whole kit and kaboodle. A similar protective mechanism is in place around the habitat's bank of cornucopia machines and large-scale fabbers: they are not mesh-accessible, and must be controlled via physical hardlink, with a security AI monitoring the entire process.