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