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