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