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