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