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