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