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