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