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