I have worked on graph visualisation for some time, did https://github.com/nikolaydubina/jsonl-graph and https://github.com/nikolaydubina/go-graph-layout
Been studying research papers on graph visualization.
It looks like we need some Deep Learning / ML based approach to this.
There is just so much meaning is encoded into XY coordinates and edges. Basic algorithms like Sugiyama produce meaningful visualizations only for simple and basic graphs.
When number of edges goes to the roof or nodes.. basic algorithms break down. Graphs become meaningless.
You have to make graphs by hand to make sense of it.
ML approaches to graph layout are very exciting, since the constraints people need in real life diagrams are quite intricate, but it's still a research problem.
ML would def benefits here to capture all these heuristics.