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