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