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