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