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