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