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