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