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