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