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