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