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)(19,23)(20,25)(21,29)(22,26)(24,27)(28,32)(30,31) involution — undirected(2,5)(6,8)(9,11,13,12)(10,14,15,16)(17,18)(19,24)(20,29)(21,25)(22,26)(23,27)(28,31)(30,32)(1,3,4,7)(2,6,5,8)(9,12,13,11)(10,14,15,16)(17,19)(18,23)(20,30)(21,27)(22,28)(24,29)(25,31)(26,32)(3,7)(6,8)(17,19)(18,24)(20,27)(21,30)(22,28)(23,29)(25,32)(26,31) 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.