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