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