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