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