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