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