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