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