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