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