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