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