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