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