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