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