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