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