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