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