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