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