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