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