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