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