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