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