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