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