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