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