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