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