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