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