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