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