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