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