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