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