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