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