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)(33,36)(34,38)(1,2,5,6)(3,7,4,8)(9,11,15,19)(10,16,17,23)(12,20,22,18)(13,14,21,24)(25,26)(27,36)(28,33)(29,34)(30,35)(31,32)(37,40)(38,39)(1,3,5,4)(2,7,6,8)(10,17)(11,19)(12,22)(13,21)(25,27,31,28)(26,33,32,36)(29,35,39,37)(30,34,40,38)(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)(26,33,32,36)(29,35,39,37)(30,38,40,34)(1,4,5,3)(2,8,6,7)(9,13,15,21)(10,18,17,20)(11,14,19,24)(12,23,22,16)(25,29,31,39)(26,34,32,38)(27,37,28,35)(30,36,40,33)(9,14)(10,12)(11,21)(13,19)(15,24)(16,20)(17,22)(18,23)(25,30)(26,35)(27,34)(28,38)(29,36)(31,40)(32,37)(33,39) 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.