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