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