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