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