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