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