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