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