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