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