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