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