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