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