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