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