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