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