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