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