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