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