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