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