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