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