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