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)(17,18,22,27)(19,29,32,24)(20,33,36,25)(21,26,23,28)(30,39,46,45)(31,44,38,40)(34,41,47,48)(35,43,37,42)(2,6)(7,8)(9,11)(10,13)(12,16)(14,15)(17,19,22,32)(18,24,27,29)(20,34,36,47)(21,31,23,38)(25,41,33,48)(26,40,28,44)(30,35,46,37)(39,42,45,43)(1,3,5,4)(2,7,6,8)(10,14)(11,16)(17,19)(18,24)(20,30)(21,38)(22,32)(23,31)(25,39)(26,44)(27,29)(28,40)(33,45)(34,37)(35,47)(36,46)(41,43)(42,48)(1,3,5,4)(2,7,6,8)(10,14)(13,15)(17,20,22,36)(18,25,27,33)(19,30,32,46)(21,37,23,35)(24,39,29,45)(26,43,28,42)(31,47,38,34)(40,48,44,41)(1,4,5,3)(2,7,6,8)(10,14)(13,15)(17,21,22,23)(18,26,27,28)(19,31,32,38)(20,35,36,37)(24,40,29,44)(25,42,33,43)(30,34,46,47)(39,41,45,48)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.