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