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