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