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