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)(34,38)(35,41)(36,44)(46,48)(2,5)(6,8)(19,26)(22,25)(27,32)(29,31)(33,34,37,38)(35,42,41,39)(36,45,44,40)(43,46,47,48)(1,2,4,5)(3,6,7,8)(9,10,12,14)(11,13,15,16)(17,18)(19,22)(20,23)(21,24)(25,26)(27,29)(28,30)(31,32)(33,34)(35,42)(36,40)(37,38)(39,41)(43,48)(44,45)(46,47)(9,11,12,15)(10,13,14,16)(17,19,21,26)(18,22,24,25)(20,27,28,32)(23,29,30,31)(33,35,37,41)(34,39,38,42)(36,43,44,47)(40,46,45,48)(1,3)(2,6)(4,7)(5,8)(17,20,21,28)(18,23,24,30)(19,27,26,32)(22,29,25,31)(33,36,37,44)(34,40,38,45)(35,43,41,47)(39,46,42,48)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.