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