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