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