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