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