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