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