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