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