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