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