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