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