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