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