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