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