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