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