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)(11,14)(12,16)(13,15)(17,18)(19,27)(20,32)(21,23)(22,26)(24,31)(25,35)(28,38)(29,37)(30,39)(33,41)(34,42)(36,45)(40,44)(43,48)(46,47) involution — undirected(9,11,14,10)(12,16,13,15)(18,23)(19,28)(20,33)(22,29)(24,38)(25,41)(27,40)(31,44)(32,45)(35,36)(39,42)(43,46)(2,5)(6,8)(9,12,14,13)(10,15,11,16)(17,19,29,44,21,31,22,28)(18,24,37,38,23,27,26,40)(20,34,33,43,35,30,36,46)(25,42,45,48,32,39,41,47)(1,3,4,7)(2,6,5,8)(9,12,14,13)(10,15,11,16)(18,23)(20,35)(24,27)(26,37)(30,34)(33,36)(38,40)(43,46)(9,13,14,12)(10,15,11,16)(17,20,29,33,21,35,22,36)(18,25,37,45,23,32,26,41)(19,30,44,46,31,34,28,43)(24,39,38,47,27,42,40,48)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.