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