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