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