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