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