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