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