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