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