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