This is EXACTLY this xkcd post: https://xkcd.com/1138/ 😁

Ok then maybe you should set a limit in the strength of the relations you want to display, and remove the edges that are under it. You would then have a graph of the closest relations and it would be less dense, like a "backbone" of your graph.

You probably need to apply a different layout algorithm in Gephi to have a more readable graph (if not, what’s the point of visualizing it?). A force-directed one like Force Atlas 2 (don’t forget to play with the parameters).

The visualisation is cool, but why do that?