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