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