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