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