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