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