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