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