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