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