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