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