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