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