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