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)(19,23)(20,22)(21,24)(25,31)(26,28)(27,29)(30,32)(1,3)(2,8)(4,12)(5,13)(6,15)(7,14)(9,11)(10,16)(18,22)(19,25)(23,30)(24,29)(26,32)(28,31) involution — undirected(1,4,7,2)(3,12,14,8)(5,9,6,10)(11,15,16,13)(20,27)(26,32)(1,5,7,6)(2,9,4,10)(3,13,14,15)(8,11,12,16)(17,19,21,25)(18,23,24,31)(20,26,27,32)(22,28,29,30)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.