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)(17,18,23,26)(19,27,29,31)(20,28,30,24)(21,25,22,32)(9,10)(11,14)(12,13)(15,16)(17,19,22,24,23,29,21,28)(18,20,25,27,26,30,32,31)(1,3,5,4)(2,6,7,8)(10,13)(14,16)(17,20,23,30)(18,24,26,28)(19,25,29,32)(21,31,22,27)(1,4,5,3)(2,6,7,8)(10,13)(14,16)(17,21,23,22)(18,25,26,32)(19,28,29,24)(20,27,30,31)(9,11,12,15)(10,14,13,16)(17,21,23,22)(18,25,26,32)(19,28,29,24)(20,27,30,31)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.