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