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