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