One vertex per element, one color per generator, with an edge from x to x·s.
(9,10)(11,15)(12,16)(13,14)(17,18,22,24)(19,28,30,32)(20,25,31,29)(21,27,23,26)(1,2)(3,7)(4,6)(5,8)(10,14)(11,12)(18,24)(20,31)(26,27)(28,32) involution — undirected(1,3)(2,5)(4,8)(6,7)(9,10)(11,16)(12,15)(13,14)(17,19,23,29,22,30,21,25)(18,20,27,28,24,31,26,32)(3,8)(5,7)(9,11,13,12)(10,15,14,16)(17,20,22,31)(18,25,24,29)(19,26,30,27)(21,32,23,28)(2,6)(5,7)(9,12,13,11)(10,15,14,16)(17,21,22,23)(18,26,24,27)(19,29,30,25)(20,28,31,32)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.