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