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