One vertex per element, one color per generator, with an edge from x to x·s.
(10,14)(15,22)(16,19)(23,24)(25,26,30,31)(27,28,35,32)(29,33,39,40)(34,36,38,37)(1,2)(3,6)(4,7)(5,8)(9,10)(11,15)(12,16)(13,14)(17,23)(18,22)(19,21)(20,24)(26,31)(28,32)(33,40)(36,37) involution — undirected(1,3)(2,4)(5,7)(6,8)(25,27)(26,32)(28,31)(29,34)(30,35)(33,37)(36,40)(38,39) involution — undirected(1,3)(2,6)(4,8)(5,7)(9,10)(11,15)(12,19)(13,14)(16,21)(17,24)(18,22)(20,23)(25,28,30,32)(26,27,31,35)(29,37,39,36)(33,38,40,34)(1,3)(2,6)(4,8)(5,7)(9,11,13,18)(10,15,14,22)(12,20,21,17)(16,24,19,23)(25,27)(26,32)(28,31)(29,38)(30,35)(33,36)(34,39)(37,40)(1,4,5,6)(2,7,8,3)(9,12,13,21)(10,16,14,19)(11,17,18,20)(15,23,22,24)(25,29,30,39)(26,33,31,40)(27,34,35,38)(28,36,32,37)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.