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