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