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