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