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