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