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