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