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