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)(19,25,26,23)(20,28,29,24)(27,30,32,31)(33,34)(35,37)(36,43)(38,40)(39,41)(42,45)(44,47)(46,48)(11,15)(13,16)(18,22)(19,26)(20,29)(30,31)(33,35,39,36)(34,37,41,43)(38,44,46,42)(40,47,48,45)(9,11)(10,13)(12,15)(14,16)(17,18)(19,23)(20,28)(21,22)(24,29)(25,26)(27,31)(30,32)(33,36,39,35)(34,37,41,43)(38,44,46,42)(40,45,48,47)(1,2)(3,5)(4,6)(7,8)(17,19,21,26)(18,23,22,25)(20,27,29,32)(24,30,28,31)(33,37)(34,36)(35,41)(38,45)(39,43)(40,44)(42,48)(46,47)(1,3,4,7)(2,5,6,8)(9,10)(11,13)(12,14)(15,16)(17,20,21,29)(18,24,22,28)(19,27,26,32)(23,30,25,31)(33,38,39,46)(34,40,41,48)(35,42,36,44)(37,45,43,47)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.