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