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