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