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