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