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