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)(11,14)(12,16)(13,15)(17,18,22,24,21,26,20,25)(19,27,28,23,30,32,29,31)(9,11,13,12)(10,14,15,16)(17,19)(18,23)(20,28)(21,30)(22,29)(24,27)(25,32)(26,31)(2,5)(6,8)(10,15)(11,12)(17,20,21,22)(18,24,26,25)(19,28,30,29)(23,27,31,32)(1,3,4,7)(2,6,5,8)(9,12,13,11)(10,16,15,14)(11,12)(14,16)(17,20,21,22)(18,24,26,25)(19,28,30,29)(23,27,31,32)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.