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