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