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