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