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