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