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