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)(19,23)(20,22)(21,28)(24,29)(25,26)(27,32)(30,31)(9,11,14,13)(10,15,12,16)(17,18,22,20)(19,23,25,26)(21,24,29,28)(27,30,31,32)(2,6)(3,7)(10,12)(15,16)(18,20)(19,25)(24,28)(27,31) involution — undirected(1,3,5,7)(2,4,6,8)(9,12,14,10)(11,16,13,15)(17,19,22,25)(18,23,20,26)(21,27,29,31)(24,30,28,32)(1,4)(2,7)(3,6)(5,8)(9,13,14,11)(10,16,12,15)(17,20,22,18)(19,26,25,23)(21,28,29,24)(27,32,31,30)(17,21,22,29)(18,24,20,28)(19,27,25,31)(23,30,26,32)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.