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