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