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