One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,7)(6,8)(9,10,12,14)(11,13,15,16)(17,18)(19,22)(20,23)(21,24)(25,26,29,27)(28,30,32,31)(2,3)(4,8)(17,19)(18,21)(20,24)(22,23)(25,27,29,26)(28,30,32,31)(2,3)(6,7)(19,24)(21,22)(25,28)(26,30)(27,31)(29,32) involution — undirected(1,3,5,2)(4,7,8,6)(9,10)(11,13)(12,14)(15,16)(17,19)(18,22)(20,24)(21,23)(1,4)(2,6)(3,7)(5,8)(9,11,12,15)(10,13,14,16)(17,18)(19,22)(20,23)(21,24)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.