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