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