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