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