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