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