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