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