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