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