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