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