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