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