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