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