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