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