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