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