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