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