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