One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,13)(4,10)(5,7)(6,15)(8,12)(9,16)(11,14)(20,28)(24,31)(27,32)(29,30)(35,36)(39,40)(43,44)(46,47) involution — undirected(1,3)(2,9)(4,6)(5,14)(7,15)(8,16)(10,11)(12,13)(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)(1,4,8,5)(2,10,12,7)(3,6,16,14)(9,11,13,15)(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)(1,5,8,4)(2,10,12,7)(3,14,16,6)(9,11,13,15)(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)(1,6,8,14)(2,11,12,15)(3,4,16,5)(7,9,10,13)(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)(1,7,8,10)(2,5,12,4)(3,15,16,11)(6,9,14,13)(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.