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