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