What visualization tool is that and what does this image show?
Discussion
It's not a tool, it's just aa ad-hoc javascript script that renders transactions.
What it shows is that the donations' address received 3 transactions, all comming from Wasabi coinjoined outputs. This is not strictly necessary but donors don't want to be tracked.
As a curiosity I found it interesting because it shows that privacy supporters donate to a cause and they don't care about tribe wars.
What libraries do you use?
vis.js https://visjs.org/