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