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