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