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