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