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