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