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