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