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