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