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