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