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