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