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