There are a few ways I find the graph representation of openings to be interesting:
You can naturally view transpositions in a way that can be tricky with other opening explorers.
I find coloring moves by player rating to be very helpful for spotting obscure moves better players make (Black-White win rate can be less helpful as good players play each other so win rates don't change much).
I also just find it more fun to look at a graph than a standard opening explorer, so find myself exploring openings I otherwise would not have looked at.
You can naturally view transpositions in a way that can be tricky with other opening explorers. I find coloring moves by player rating to be very helpful for spotting obscure moves better players make (Black-White win rate can be less helpful as good players play each other so win rates don't change much). I also just find it more fun to look at a graph than a standard opening explorer, so find myself exploring openings I otherwise would not have looked at.