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