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