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