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