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