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