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)(19,23)(21,24) involution — undirected(6,8)(9,11,14,15)(10,13,16,12)(17,18,20,22)(19,21,23,24)(5,6,7,8)(9,12,14,13)(10,11,16,15)(17,19)(18,21)(20,23)(22,24)(1,2)(3,4)(9,13,14,12)(10,15,16,11)(17,18)(19,21)(20,22)(23,24)(9,10)(11,13)(12,15)(14,16)(17,19)(18,21)(20,23)(22,24) 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.