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