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