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