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