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)(11,14)(12,15)(13,16)(17,18,21,20)(19,22,23,24)(26,30)(27,32)(2,7)(5,8)(9,10,12,15)(11,14,16,13)(18,20)(22,24)(1,3,6,4)(2,8,7,5)(9,11)(10,13)(12,16)(14,15)(17,18,21,20)(19,22,23,24)(25,26,29,30)(27,31,32,28)(1,4,6,3)(2,8,7,5)(9,11)(10,14)(12,16)(13,15)(17,19)(18,22)(20,24)(21,23)(25,27)(26,31)(28,30)(29,32)(1,5,6,8)(2,4,7,3)(9,10)(11,13)(12,15)(14,16)(17,20,21,18)(19,22,23,24)(25,28,29,31)(26,27,30,32)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.