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