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