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