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