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