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