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by skewbone 1614 days ago
Graphviz ships with a tool called dotty that can be used for visual graph editing. It's a bit cumbersome but does work.

https://www.graphviz.org/pdf/dottyguide.pdf

Edit: I don't know of a really good visual tool as I've found text editing .dot files directly with a live visualization pretty nice. I use graphviz pretty regularly.