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