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