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