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