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