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)(11,12)(13,15)(14,16)(17,18,22,21)(19,24,20,23)(26,29)(30,32)(2,5)(6,7)(9,11,13,16)(10,14,15,12)(17,18,22,21)(19,23,20,24)(3,8)(6,7)(11,16)(12,14)(17,19,22,20)(18,23,21,24)(25,26)(27,30)(28,29)(31,32)(1,3,4,8)(2,6,5,7)(9,12)(10,11)(13,14)(15,16)(17,20,22,19)(18,24,21,23)(1,2)(3,6)(4,5)(7,8)(9,10)(11,12)(13,15)(14,16)(17,21,22,18)(19,24,20,23)(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.