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