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