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