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