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