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