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