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