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