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)(11,16)(12,15)(13,14)(17,18,21,25)(19,27,28,23)(20,24,33,38)(22,26,32,37)(29,39,41,34)(30,40,42,35)(31,36,45,48)(43,47,44,46)(1,3,5,4)(2,6,8,7)(9,10)(11,16)(12,15)(13,14)(19,28)(20,31)(22,32)(23,27)(24,36)(26,37)(29,43)(33,45)(34,46)(38,48)(39,47)(41,44)(1,3,5,4)(2,7,8,6)(10,14)(15,16)(17,19,21,28)(18,23,25,27)(20,29,33,41)(22,30,32,42)(24,34,38,39)(26,35,37,40)(31,44,45,43)(36,47,48,46)(9,11,13,12)(10,15,14,16)(17,20,32,45,21,33,22,31)(18,24,37,48,25,38,26,36)(19,29,42,43,28,41,30,44)(23,34,40,46,27,39,35,47)(1,4,5,3)(2,7,8,6)(9,12,13,11)(10,15,14,16)(19,28)(23,27)(29,41)(30,42)(34,39)(35,40)(43,44)(46,47)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.