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)(19,26)(20,24)(21,23)(22,31)(25,29)(27,32)(28,30)(2,5)(6,8)(9,11,12,16)(10,13,14,15)(17,19,23,29)(18,25,21,26)(20,30,31,27)(22,28,24,32)(1,3,4,7)(2,6,5,8)(10,14)(11,16)(17,20)(18,22)(19,27)(21,24)(23,31)(25,32)(26,28)(29,30)(10,14)(13,15)(17,21,23,18)(19,27,29,30)(20,22,31,24)(25,32,26,28)(2,5)(6,8)(10,14)(13,15)(17,22,23,24)(18,20,21,31)(19,28,29,32)(25,30,26,27)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.