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