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