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