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