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