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