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