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