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