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