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