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