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)(11,14)(12,15)(13,16)(17,18)(19,27)(20,25)(21,26)(22,24)(23,29)(28,32)(30,31)(2,5)(6,8)(11,12)(14,15)(17,19,21,29)(18,23,26,27)(20,30,22,28)(24,31,25,32)(9,11,13,12)(10,14,16,15)(18,24)(20,22)(23,31)(25,26)(27,32)(28,30)(9,12,13,11)(10,15,16,14)(1,3,4,7)(2,6,5,8)(10,16)(14,15)(17,20,21,22)(18,25,26,24)(19,28,29,30)(23,31,27,32)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.