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