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