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