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