One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,5)(3,6,7,8)(11,15)(14,16)(17,18)(19,27)(20,24)(21,34)(22,25)(23,29)(26,35)(28,41)(30,42)(31,46)(32,40)(33,48)(36,44)(37,45)(38,47)(39,43)(9,10)(11,14)(12,13)(15,16)(17,19,21,29,22,30,35,45)(18,23,26,27,25,37,34,42)(20,31,33,47,32,28,43,44)(24,38,39,46,40,36,48,41)(2,5)(6,8)(10,13)(14,16)(17,20,22,32)(18,24,25,40)(19,28,30,31)(21,33,35,43)(23,36,37,38)(26,39,34,48)(27,41,42,46)(29,44,45,47)(1,3,4,7)(2,6,5,8)(10,13)(14,16)(17,20)(18,24)(19,28)(21,33)(22,32)(23,36)(25,40)(26,39)(27,41)(29,44)(30,31)(34,48)(35,43)(37,38)(42,46)(45,47)(9,11,12,15)(10,14,13,16)(18,25)(20,32)(23,37)(26,34)(27,42)(28,31)(33,43)(44,47)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.