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