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