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