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