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