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