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