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