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