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