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