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