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