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