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