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