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)(19,28)(20,30)(21,22)(23,25)(24,29)(26,32)(27,31) involution — undirected(1,2,6,3)(4,7,12,9)(5,8,13,10)(11,14,16,15)(17,19,23,29)(18,24,25,28)(20,31,32,21)(22,26,27,30)(33,34,38,39)(35,37,41,46)(36,40,45,47)(42,44,43,48)(5,13)(8,10)(11,16)(14,15)(18,25)(22,27)(24,28)(26,30)(34,39)(37,46)(40,47)(44,48) involution — undirected(1,3,6,2)(4,7,12,9)(5,10,13,8)(11,14,16,15)(17,20,23,32)(18,26,25,30)(19,21,29,31)(22,28,27,24)(33,35,38,41)(34,37,39,46)(36,43,45,42)(40,48,47,44)(1,4,6,12)(2,7,3,9)(5,11,13,16)(8,14,10,15)(17,21)(18,27)(19,20)(22,25)(23,31)(24,30)(26,28)(29,32)(33,36)(34,40)(35,42)(37,44)(38,45)(39,47)(41,43)(46,48)(1,5,6,13)(2,8,3,10)(4,11,12,16)(7,14,9,15)(17,22,23,27)(18,21,25,31)(19,26,29,30)(20,28,32,24)(33,37)(34,41)(35,39)(36,44)(38,46)(40,43)(42,47)(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.