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