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