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