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