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