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