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