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