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