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