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