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