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)(11,13)(12,20)(14,19)(15,17)(16,21)(18,23)(22,24) involution — undirected(1,3)(2,5)(4,8)(6,7)(9,11,13,10,15,19,14,17)(12,18,21,16,23,20,22,24)(3,8)(5,6)(9,12)(10,16)(11,18)(13,21)(14,22)(15,23)(17,24)(19,20) involution — undirected(1,3)(2,6)(4,8)(5,7)(9,13,15,14)(10,11,17,19)(12,21,23,22)(16,18,24,20)(3,8)(5,6) 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.