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