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