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