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