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