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