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