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