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