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