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