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