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