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