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