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