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