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