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