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)(19,25)(20,24)(21,26)(22,23)(27,29)(28,30)(31,32)(33,34,38,39)(35,40,43,36)(37,45,47,41)(42,44,48,46)(3,9)(7,13)(10,15)(14,16)(17,18)(19,21)(20,28)(22,23)(24,30)(25,26)(27,29)(31,32)(34,39)(36,40)(41,45)(44,46) involution — undirected(2,6)(7,13)(8,11)(14,16)(18,23)(19,26)(24,28)(27,32)(33,35,38,43)(34,36,39,40)(37,42,47,48)(41,44,45,46)(1,2)(3,7)(4,8)(5,6)(9,13)(10,14)(11,12)(15,16)(17,19)(18,21)(20,27)(22,26)(23,25)(24,31)(28,29)(30,32)(33,35)(34,40)(36,39)(37,42)(38,43)(41,46)(44,45)(47,48) involution — undirected(1,3,5,9)(2,7,6,13)(4,10,12,15)(8,14,11,16)(17,20)(18,24)(19,27)(21,31)(22,30)(23,28)(25,29)(26,32)(33,36,38,40)(34,35,39,43)(37,46,47,44)(41,48,45,42)(1,4,5,12)(2,8,6,11)(3,10,9,15)(7,14,13,16)(17,21)(18,19)(20,29)(22,25)(23,26)(24,32)(27,28)(30,31)(33,37,38,47)(34,41,39,45)(35,42,43,48)(36,44,40,46)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.