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