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