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