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)(20,22)(21,33)(25,40)(26,44)(27,39)(28,31)(29,45)(32,36)(34,37)(35,47)(38,42)(41,46)(43,48) involution — undirected(1,3,6,14)(2,7,9,16)(4,13,5,12)(8,15,10,11)(17,18)(19,25)(20,26)(21,34)(22,37)(23,27)(24,33)(28,41)(29,46)(30,42)(31,43)(32,39)(35,48)(36,44)(38,47)(40,45)(2,8)(4,5)(7,15)(9,10)(11,16)(12,13)(17,19)(18,25)(20,31)(21,35)(22,28)(23,30)(24,38)(26,43)(27,42)(29,36)(32,45)(33,47)(34,48)(37,41)(39,40)(44,46) involution — undirected(2,9)(7,16)(8,10)(11,15)(17,20,23,22)(18,26,27,37)(19,28,30,31)(21,32,36,33)(24,34,39,44)(25,41,42,43)(29,45,35,47)(38,46,40,48)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.