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