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