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