One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,9,5,8,4,13)(3,10,11,7,12,16,14,15)(18,23)(19,26)(20,21)(24,31)(25,29)(27,28)(1,3,6,11,5,12,4,14)(2,7,9,16,8,15,13,10)(17,18)(19,24)(20,29)(21,23)(22,25)(26,30)(27,32)(28,31)(2,8)(7,15)(9,13)(10,16)(17,19,20,27,22,28,21,26)(18,24,29,32,25,31,23,30)(18,25)(23,29)(24,31)(30,32) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.