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