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