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