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