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