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