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