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