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