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