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