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