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