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