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