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