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