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