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