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