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