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