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