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)(17,18,22,24)(19,20,27,23)(21,29,31,25)(26,32,30,28)(34,38)(35,43)(36,46)(42,48)(1,2)(3,9)(4,12)(5,6)(7,11)(8,13)(10,14)(15,16)(17,19,22,27)(18,23,24,20)(21,30,31,26)(25,28,29,32)(33,34,39,38)(35,44,43,40)(36,41,46,47)(37,48,45,42)(2,6)(7,9)(8,12)(14,15)(18,24)(20,23)(25,29)(28,32)(33,35,39,43)(34,40,38,44)(36,45,46,37)(41,48,47,42)(1,2)(3,9)(4,8)(5,6)(7,11)(10,15)(12,13)(14,16)(17,20)(18,19)(21,28)(22,23)(24,27)(25,26)(29,30)(31,32)(33,36)(34,41)(35,45)(37,43)(38,47)(39,46)(40,48)(42,44) involution — undirected(1,3,5,11)(2,7,6,9)(4,10,13,16)(8,14,12,15)(17,19)(18,23)(20,24)(21,26)(22,27)(25,32)(28,29)(30,31)(33,37,39,45)(34,42,38,48)(35,36,43,46)(40,41,44,47)(1,4,5,13)(2,8,6,12)(3,10,11,16)(7,14,9,15)(17,21)(18,25)(19,26)(20,28)(22,31)(23,32)(24,29)(27,30)(33,38,39,34)(35,44,43,40)(36,47,46,41)(37,48,45,42)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.