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