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