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