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