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