Diagram / Active Content Plugin?

I’m not a big fan of taking the easy way out and just asking a question without doing my research so I apologize to all of you for my failure to produce results.

I run a WordPress site for my department at work that keeps track of a lot of our daily tasks. One question that came up is the ability to keep tracking of around 50ish facilities and what technicians are at what facility that day as it changes often. My first thought was a diagram based “whiteboard” where I draw all of the facilities and then perhaps have technicians names that are dragable. After playing around with a few (Model Xtractor, Gliffy) none had the features I was looking for and were usually an over complicated tool for what I needed. I’m actually struggling with what to even call it in searches which is why I’ve likely had little luck finding anything.

So here’s my question to the knowledgeable masses. Is anyone aware of something that would allow this functionality? My only needs are something visual that’s editable by all (or if needed, just a permission group).