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