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