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