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