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