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)(27,35)(28,37)(29,34)(30,32)(31,38)(33,39)(36,40)(1,2,5,7)(3,4,8,6)(10,13)(11,18)(16,22)(19,21)(25,27,30,38)(26,31,32,35)(28,34,39,36)(29,37,40,33)(1,3,5,8)(2,6,7,4)(12,20)(16,22)(19,21)(23,24)(26,32)(29,40)(31,35)(33,37)(1,3,5,8)(2,6,7,4)(9,11,14,18)(10,15,13,17)(12,21,20,19)(16,24,22,23)(25,28,30,39)(26,33,32,37)(27,36,38,34)(29,31,40,35)(1,3)(2,4)(5,8)(6,7)(9,12)(10,16)(11,19)(13,22)(14,20)(15,23)(17,24)(18,21)(25,29,30,40)(26,34,32,36)(27,37,38,33)(28,31,39,35)(1,4)(2,3)(5,6)(7,8)(9,13,14,10)(11,17,18,15)(12,22,20,16)(19,24,21,23)(25,27)(26,31)(28,36)(29,37)(30,38)(32,35)(33,40)(34,39)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.