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