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)(11,13)(12,14)(15,16)(17,18)(19,23)(20,21)(22,24)(25,26,29,31)(27,32,28,30)(1,2)(3,4)(5,6)(7,8)(11,15)(13,16)(18,20)(22,23)(25,27,29,28)(26,30,31,32)(2,6)(3,7)(9,10,12,14)(11,13,15,16)(17,19)(18,22)(20,23)(21,24)(25,26,29,31)(27,32,28,30)(1,3,5,7)(2,4,6,8)(9,10)(11,13)(12,14)(15,16)(17,19)(18,23)(20,22)(21,24)(25,26)(27,30)(28,32)(29,31)(1,4)(2,7)(3,6)(5,8)(9,11)(10,13)(12,15)(14,16)(17,20,21,18)(19,23,24,22)(25,28,29,27)(26,30,31,32)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.