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)(19,26)(20,24)(21,25)(22,23)(27,31)(28,30)(29,32)(1,3,5,8)(2,6,4,7)(9,10,12,13)(11,16,15,14)(17,19,21,22)(18,23,25,26)(20,28,29,27)(24,31,32,30)(9,10)(11,14)(12,13)(15,16)(18,23)(19,22)(24,30)(25,26)(27,28)(31,32) involution — undirected(3,8)(6,7)(10,13)(14,16)(17,20,21,29)(18,24,25,32)(19,27,22,28)(23,30,26,31)(1,4,5,2)(3,7,8,6)(9,11,12,15)(10,14,13,16)(17,19,21,22)(18,23,25,26)(20,28,29,27)(24,31,32,30)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.