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