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