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