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