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