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