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