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