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