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