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