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