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