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