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