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