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)(19,23)(20,24)(21,27)(22,25)(26,30)(28,31)(29,32) involution — undirected(1,3,5,4)(2,6,8,7)(9,11)(10,13)(12,15)(14,16)(17,19,22,27)(18,21,25,23)(20,28,31,24)(26,32,29,30)(1,3,5,4)(2,7,8,6)(10,14)(11,15)(17,19)(18,21)(20,29)(22,27)(23,25)(24,30)(26,31)(28,32)(1,4,5,3)(2,6,8,7)(10,14)(13,16)(17,20,21,32,22,31,23,30)(18,24,27,29,25,28,19,26)(2,8)(6,7)(17,21,22,23)(18,19,25,27)(20,30,31,32)(24,29,28,26)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.