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)(17,18,23,25,22,24,20,29)(19,27,26,31,28,21,30,32)(1,3,6,2)(4,7,5,8)(9,11,12,15)(10,13,14,16)(17,19)(18,21)(20,30)(22,28)(23,26)(24,27)(25,32)(29,31)(10,14)(13,16)(18,24)(19,28)(25,29)(26,30) involution — undirected(1,4,6,5)(2,7,3,8)(17,20,22,23)(18,25,24,29)(19,26,28,30)(21,31,27,32)(1,5,6,4)(2,7,3,8)(17,21,20,31,22,27,23,32)(18,26,29,19,24,30,25,28)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.