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