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