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