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