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