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