How do you draw effective network maps?

Working on an audit for a company at the moment and they have requested a network diagram for all their S2S VPN’s etc.

I’ve tried both Visio and Draw.IO but everything I make just looks like a 10 year old did it! In my head I know how I want it to look but trying to make something look professional is something I’m struggling with. It’s mostly the scale of the items and text while trying to make it look clean that’s the issue. It’s probably I just suck but would love some tips or insights from people who do this on the regular.