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