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