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