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