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