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