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