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