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