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