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