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