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