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