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