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