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)(11,14)(12,15)(13,16)(17,18,22,25)(19,23,28,38)(20,30,33,42)(21,34,36,26)(24,35,41,32)(27,43,31,48)(29,46,45,39)(37,47,40,44)(2,5)(6,8)(9,11,14,10)(12,15,13,16)(17,19,22,28)(18,23,25,38)(20,31,33,27)(21,29,36,45)(24,40,41,37)(26,39,34,46)(30,48,42,43)(32,47,35,44)(9,12,14,13)(10,15,11,16)(17,20,22,33)(18,24,25,41)(19,27,28,31)(21,35,36,32)(23,37,38,40)(26,42,34,30)(29,47,45,44)(39,48,46,43)(9,12,14,13)(10,15,11,16)(19,28)(23,38)(27,31)(29,45)(37,40)(39,46)(43,48)(44,47)(1,3,4,7)(2,6,5,8)(9,13,14,12)(10,15,11,16)(18,25)(19,28)(24,41)(26,34)(27,31)(29,45)(30,42)(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.