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