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