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