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