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