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