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