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