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