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