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