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