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