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