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