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