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