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