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