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