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