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