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