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