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