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