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