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