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