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