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