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