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