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