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