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