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