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