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