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