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