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