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