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