It's been a few years, but I remember jetbrains IDEs had these, though I'm not totally sure it was built-in rather than a plugin. Personally I find automated diagrams are not that useful. You generally need to have some understanding of what's happening to know what to hide and collapse to tame the spaghetti. So it needs someone in the know to be explanatory, and as a tool it requires a similar amount of fiddling to just drawing some boxes in slideware.