One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(9,10,13,11)(12,15,16,14)(17,18)(19,22)(20,25)(21,26)(23,27)(24,29)(28,30)(31,32)(2,4)(6,8)(18,19)(20,27)(24,26)(28,32) involution — undirected(1,2)(3,4)(5,6)(7,8)(9,11,13,10)(12,15,16,14)(17,19,22,18)(20,23,27,25)(21,26,29,24)(28,30,32,31)(1,2)(3,4)(9,12)(10,14)(11,15)(13,16)(17,20)(18,23)(19,25)(21,28)(22,27)(24,30)(26,31)(29,32) involution — undirected(17,21,22,29)(18,24,19,26)(20,28,27,32)(23,30,25,31)A 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.