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