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