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