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