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