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