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