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