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