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