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