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