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