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