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