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