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