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