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