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