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