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