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