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