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