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