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