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