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