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