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