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