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