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