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