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