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