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