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