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